Concept:Lower internal resistance lets an accumulator deliver a larger current more effectively.Explanation:A lead-acid accumulator has a lower internal resistance than an alkaline accumulator.So it can supply a high current without a large drop in terminal voltage.This makes it better for applications that need heavy current.Recharging is common to both accumulators, so option B is not the advantage.A shorter life span is a disadvantage, not an advantage.Answer:A. possesses low internal resistance